Molding machine



April 24, 1928. 1,667,673

C. H. PEIRSON ET AL HOLDING MACHINE Filed Au. 12. 1926 3 s .s et 1 April 24, 1928. 1,667,673

.c. H. PEIRSON ET AL MQLDING MACHINE Filec Aux. 12. 1926 3 Sheets-Sheec 2 April 24, 1928. 4 1,667,73

C. H. PEIRSON ET AL V HOLDING MACHINE Fil 3 SheetsSheet 3:

' vated Petented Apr. 24, 1928.

PATENT OFFICE.

CHARLES E. PEIBSON AND WILLIH A. BORNE, OIE PHILA.DELPI, PENNSYLVJI, ASSIGNOBS '.I.O E. F. HOUGHTON & COMPANY, 01 PHILADELIHIA, PENNSYLVANIA,

A. CORPORATION 025 PENNSYLVNI.

HOLDING MACHINE.

Application fllcd August 12, 1928. .Serlal NO. 128,828.

This invention relates to certain improvemente in machines for molding or forming cup s of leather or similar material.

he object of the invention is to make a power molding machine in which a number of leather cups can be shaped and formed by a single operation. The invention also relates to certain details of construction which will be described hereinafter.

In the accompanying drawings:

Figure 1 is a front elevation of our improved cup molding machine;

Fig. 2 1s a plan view;

Fig. 3 is a sectional elevation on the line 33, Fig. 2; 9 Fig. 4 is an enlarged Sectional view showing the upper and lower dies with a molded ou in position; and

ig. 5 is a perspective view of one of the formed cups.

The lower housing 1 of the Iholding press is connected by heavy rods to the upper housing 3. The rods are threaded at each end and nuts adjustably hold the rods to the housings.

The lower die carrier 4 is mounted on the rods 2, and has a limited Vertical movement,

on said rods: stops 5 are mounted on the A threaded ortions 2 of the rod which can be clampe in osition after ad'ustment.

The up et 1e carrier 6' is mounted on the ro s 2 and has a. limited d0wnwnd movement toward the lower die. Stops 7 on, the rod similarto the stops 5 limit'the downward movement of the upper die cerner.

The upper die carrier 6 is held in the aletionbysp Blocatedineh side o the machme as fiown in 1.

In the lower housing 1 are two ydraulic cylinders 9 in-the present instance, having capsl0. Within the cylinders 9 are p1 'with eu 11 havmg' reduced portions and rov1ded at their lower ends. 'lle upper Ipllnungers extends through suite leendof e -g de. The

-paclnng 1 ers11 amattached to the under silff the lower die v f0 the bottom of the two cylinders 99 a pipe 18 and connected to the sptee carrier by screw stade 12 as shown in Fig. 3. A valve casing 13'is connectedto a pres sure deviee by a pipe 14 and to exhmst byapipe 15. The casing is also eonnecfi;fl;

formed by the ieduced portions of the plungers by 8 pipe 1? forming a pull back. VVithin the casmg 1s :1 four-way valve 18 contrbllin the ports of the casing: and actuable y 'a pipe 16 and is connected to a valve casing 19 In this' casing is a pressure valve which is opened et the upper end of the machine.

when the lower die carrier comes in contact Wltl1 the stops 5 allowing fluid to pass from the pipe 16" through a pipe 20 to the up r ends of cylinders 21 secured to the un er side of. the upper housing 3 causing the plungers 22 within the cylinders t0 force the upper die carrier 5 down against the pressure of the springs8 until the carrier comes in contact'with the stops 7.

A bypnss pipe 23 is connected to the pipes 16 and 20 by passing the preure valve.

In the flpipe 23 is a check valve which prevents u1d under pressure 'assing fr om the pipe 16 to the pipe 20 wi out through the reure valve, but fluid to pass om the 16 and to exhaust.

In the lower die carrier 4 are a series of threaded openings with the exception of small holes jand open fn fl threaded 25 e openmgs are 8120 which regulate the deph of the base f the lower die, The stops ave spanner holee 28 for the reception of a. tool paed the side openings in the lower die cufier, shown clearly in Fig. 4;.

Thestopsamheldinpofionsflerajustmentby set screws2.

The lower dies 28 are clnm pipe 20 to the pipe 24 closed dtthe bottom v ingotheafing plate29,sec to'thelower' 7 die carrier 4, and within each lower die il a.disk 30 formmg The disknsts upon the reduoedend of the stop 25 wlien the cup ie israidofi-atthestoplrym adjufltable ej:ipin31 whenthelowerdierfiefle low asinFig.3,

being-molded but an intrnally threaded tuhular portion 32 cylindrical edge dies and a threaded stem 33 having a head Whi0h -rests upon the packing glands of the lower housings. The portion 32 has a longitudinal slot 34 to receive a pin 35 winch extends from the stop 25 and prevents the portion 32 of the ejector turning in the stop.

Secured to the upper housing 3 are a series of stems 36 carr ing at their lower ends the upper dies 37 or pressing the leather or other niaterial into the lower dies to form cups. These stems are threaded and extend through the upper housing and are pro- Vided with adjusting nuts 38 above and below the housihg.

Surrounding the upper dies 37 are cyl mdrica-l dies 39 clamped to carrier 40 'hav1ng threaded portions screwed into threaded openings in the upper die carrier 6. These carriers are vertically adjustable in the die carrier and are heldin the position in which they are adjusted by set screws4l.

By the means above described the cylindrical dies 39 can be adjusted t0 regulate the depth of the walls of the cups. The lower edges of the cylindrical dies are boveled as shown in Fig. 4 to form a beveled edge of the cup.

The operation is as follows after the parts have been adjusted to form cups of a given sue:

The leather sections are placed in the lower dies. The four-way valve is operated to admit fluid under pressure to the ylinders 9 under the plungers 11 oausing the lower die carrier to mise until it comes in contact v withthe stops 5. As the upper dies 37 are fixed they force the leather into the lower dies pushing the disks 30 until they corne into contact with the stops 25. As soon as the lower die carrier stops then the fluid operates the, pressure valve 19 and fiows through the pipe 20 to the upper ends of the cylinders2l causing the plungers 22 t0 depress the upper die carrier forcing the 39 into the lower dies and compressing the edges of the leather cups and forming the bevel at the edges. When the four-way valve 18 is moved to br1ng the exhaust ports in communication vvrthhe ipe 16=16 the upper die carrier 1s ra1sed y 1ts s rings, and the lower die has a tendency to escend by its own weight. To msure 1ts returning to its first positmn, however, fluid under pressure is directed through the pipe 17 into the cylinders 9 above the lower efiective end of the plungers wh1ch positively forces the plungers down.

We claim: y 1. I.he' combination in a machine for moldmg on 5 of leather and like material, of a--fixed ie- 3, movable die for forming a cup around the fixed die; a second movble d1e cyhndrical in form and arranged t0 press the edge of the eup to size; 1; stop t0 limit the movement of the first movable die;

fluid pressure mechanisms for said movable dies; a valve for controlling the flow of an actuating fluid to said mechanisms; and a. pressure valve in the line leading to the fluid pressure mechanism of said second movable die adapted to be operated automatically by increased pressure when the cup-forming movement of the first movable die is interrupted by the stop, whereby the second movable die will be actuated t0 compress the edges of the cp to size.

2. The combinacion in a machine for molding cups of leather or similar material, of an upper and lower housing; means for connecting the housings; a series of fixed dies projecting from the upper power cylinders in the lower housing; means for supplying fluid under pressure to the cylinders; plungers in the cylinders; a lower die carrier attachedto the plungers; a

series of dies mounted on the carrier; 'power cylinders in the upper housing; plungers in said c'ylindeis; an upper die carrier, through which the fixed dies extend, attached to said plungers; cylindrical dies car ried by the upper die carrier and surrounding the fixed dies; means for supplyin% fluid under pressure to all the cylinders ino uding a valve for controlling the actuating fluid; and stops t0 limit the movement of the car riers, the said valve being so arranged that when the lower die carrier has been raised to form cups over the fixed dies, the upper die carrier is actated by the fluid pressure to cause the cylindrical dies t0 press the edges of the cups t0 size.

3. The combination in a machine for molding cups of leather or similar material ofa lower housing having cylinders therein; an upper housing connected to the lower housing; fixed upper dies depending from the said upper housing; a lower die carrier; plungers in the cylinders of the lower housing attached to the lower die carrier; dies on said carrier; a series of adjustable stops in the lower die carrier direotly under thedies; a disk normally resting on the stops and forming the bottom of the dies; an e%ector for raising the disk and discharging t e cups when the die carrier is lowered; an upper die carrier; a spring. for supporting the said die carrier; cylindrs scured to sure; and valve means for controlling the 4:. The combination of a lower housing and an upper housmg; rods connecting the housmg5; a lower die carrier and an upper die carrier; springs' supportin the upper die carrier; a cylinder in thelower housmg;

a plunger attached to the lower die carrier and extending into the cylinder; a plate on the lower die carrier and a lower die arried thereby; an adjustable stop in the die carriel; a loose disk mounted on the stop when,

towards each other and form cups.

5. The combination of a lower housng and an upper housing; rods connecting the housings; a'lower die carrier and an upper die carrier; a loosedisk mounted on die carrier; springs s'upporting the upper die carr1er; a cylinder in the lower housmg;

a plunger attached to the lower die carrier and. extendin into.the cylinder; a heating late on the .ower die carrier and a lower ie carried thereby; an adjustahle stoplin the t e stop when the cup is being :formed; means for raising the\ dis]: when th e. die carrier ,is lowered to eject the formed eu a fixed upper die carried -by the upper osing; a cylmdriea1 die carried by the up or die carrier arran cl to enter the lower ie after the lower die as been raised; a cylinder in the upper housing; a. plunger" in the cylinder bearmg against the upper die carrier; means for admitting'fludunder Pressure to the cylinders to cause, the die carriers to move toward each other and form. caps; a valve controlfing the flowof.fluid to theltwo y1i v carriers dors; and a pressure valve in the line lead- .ing to the upper cylinders, actuated when and an upper die carrier mounted on the rods; stops on the rods for limiting the movement of the two carriers; springs for maintaining the upper die carrier in raised position; cylinders in the lower housing;

plun ers attached to. the lower die carrier and ocated in the cylinders; cylinders secured 'to the upper housin plungers in the cylinders bearmg against t e upper die carrier; a heating plate 'mounted on the lower die cafrier; lower dies secured to the heating plate; movable disks in the lower die and forming bottoms thereof; threaded stops mourited in'threided openings in the lower die carrier and arranged to support the disks when pressure is applied; ejectors ektending through the"stops for raising the disks and formed cup:v; fixed dies adjustabl mounted in t e upper housing and exten ing through the upper die carrier; adjustable die su ports n1ounted in the carrier; cylindrical ies scured Il) the supports and encircling the fixed dies; piping. and a .control valve for controlling the fluid leading to the cylinders; and a pressure valve m the line ladin to the upper Cylinders, so that when the oWer die carrier 1s raised and forms the cups over the fixed up et dies and comes to a stop, the- -fluid un en pressure Will then a0tuate the upper plungers and force the upper die carupper rier toward the lower die carrier, the upper 00 cylindrieal dies entering the lower dies and acting to compress the ed es of the ou 5. V CHARLE H. PEIRS N.

W. A. BORNE. 

